According to my H, we are separated (in house, separate bedrooms, like your W), thus he can do whatever he likes. He has registered on various dating sites and is "dating". I don't know how far these dates go, but I'm not going to find out. I am actively seeking divorce myself.
Your W may think this is her sitch, that she is separated therefore not married to you except for the actual paper.
Me:57 H:52 M:28 Got another lawyer last year and filed. D35,S/D twins28,D22 EA4/04 End? Who knows? "Life is like a mirror. Smile at it and it smiles back at you." — Peace Pilgrim